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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis, characterization, photophysical and electrochemical properties of fac-tricarbonyl(4,7-dichloro-1,10-phenanthroline)rhenium(I) complexes

Texto completo
Autor(es):
Goncalves, Marcia R. [1] ; Frin, Karina P. M. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Fed Univ ABC UFABC, BR-09210170 Santo Andre, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Polyhedron; v. 97, p. 112-117, SEP 5 2015.
Citações Web of Science: 18
Resumo

The fac-{[}Re(CO)(3)Cl(Cl(2)phen)] and fac-{[}Re(CO)(3)(py)(Cl(2)phen)]PF6 complexes were synthesized, purified and characterized by H-1 NMR, UV-Vis and IR spectroscopies and both photophysical and electrochemical behaviors were investigated. The electronic absorption spectra exhibit two main absorption bands: the higher energy band, which was assigned to IL, and the lower energy band, assigned to MLCT. The fac-{[}ReCl(Cl(2)phen)(CO)(3)] and fac-{[}Re(py)(Cl(2)phen)(CO)(3)]PF6 complexes showed emission at room temperature in both CH3CN solution (lambda(max) = 640 nm, phi = 0.0027; lambda(max) = 590 nm, phi = 0.055) and rigid media (lambda(max) = 590 nm, lambda(max) = 535 nm in PMMA) arising from the lowest lying metal to ligand charge transfer ((MLCTRe -> Cl2phen)-M-3) excited state. Additionally, the PVK emission band is almost completely quenched in the presence of 4% rhenium(I) complex. Both compounds showed metal-centered oxidation, Re(I) -> (II), and ligand-based reduction, Cl(2)phen -> Cl(2)phen({*}-), in CH2Cl2 solution. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of both complexes were estimated. The electrochemical and emission properties indicate a potential application of the rhenium(I) compounds in OLED devices. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 11/23408-0 - Síntese, caracterização e investigação das propriedades fotofísicas de complexos de rênio (I)
Beneficiário:Karina Passalacqua Morelli Frin
Modalidade de apoio: Auxílio à Pesquisa - Regular